SPI example for MSP430G2553 talking to Nordic nRF24l01+ using mps430-gcc on Linux
This example shows how to use SPI on USCI_B of the MSP430g2553 to communicate to a Nordic NRF24l01+ module. It simply reads out the configuration register of the NRF and prints out the result in binary on the UART at USCI_A at 9600 bauds.
1. Hardware Setup
The wiring for this example is as follows:
|RXD P1.1||TXD serial line|
|TXD P1.2||RXD serial line|
|SCLK P1.5||NRF SCK|
|SOMI P1.6||NRF MO|
|SIMO P1.7||NRF MI|
|CS P1.3||NRF CS|
For the NRF also connect the following:
Note: When using the TI Launchpad, “/dev/ttyACM0″ could be used as serial port at 9600 Bauds, but RX/TX must be crossed on the jumper bridge of the Launchpad.
2. Get the sources
You can download the sources on github:
git clone http://github.com/wendlers/msp430-spi-nrfreg.git
This project is written for msp430-gcc on Linux (I used v4.5.3 which is available as package on Ubuntu). For flashing the “mspdebug” tool was used (also from the Ubuntu package).
To compile the source just issue a:
This builds the firmware in the “bin” subdirectory in various formats.
To flash the firmware to your Launchpad through “mspdebug”, you could use the “flash-target” make target:
5. Doxygen Docs
If you installed doxygen on your system, you could generate the HTML-based documentation by calling:
This will create the documentation under “doc/gen/html”.
Connecting your Launchpad should give you a new serial device “/dev/ttyACM0″. Connect to this port at 9600 bauds – e.g. by using screen:
screen /dev/ttyACM0 9600
After resetting the Launchpad, the configuration register of the NRF should be printed out on the serial line (status should return a value of 14 and config a value of 8).